Difference between Pectoral and Pec

Pectoral

Part of speech: adjective

Definition: Of or pertaining to the breast, or chest; as, the pectoral muscles. Relating to, or good for, diseases of the chest or lungs; as, a pectoral remedy. Having the breast conspicuously colored; as, the pectoral sandpiper.

Part of speech: noun

Definition: Protective armor for a horse's breast. A covering or protecting for the breast. A breastplate, esp. that worn by the Jewish high person. A clasp or a cross worn on the breast. A medicine for diseases of the chest organs, especially the lungs.

Pec

Part of speech: noun

Definition: The pectoralis major muscle.